Home / 109,815.10-164,722.65-72,417.40

Finding the Fourth Proportional to 109,815.10, 164,722.65 and 72,417.40

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Solution

The fourth proportional to 109,815.10, 164,722.65 and 72,417.40 is: 108,626.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,815.10 : 164,722.65 = 72,417.40 : x
  2. Step 2: Convert to fraction form
    109,815.10/164,722.65 = 72,417.40/x
  3. Step 3: Cross multiply
    109,815.10x = 164,722.65 × 72,417.40
  4. Step 4: Simplify right side
    109,815.10x = 11,928,786,034.11
  5. Step 5: Solve for x
    x = 11,928,786,034.11/109,815.10
  6. Step 6: Final answer
    x = 108,626.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.